patch 8.2.0067: ERROR_UNKNOWN clashes on some systems

Problem:    ERROR_UNKNOWN clashes on some systems.
Solution:   Rename ERROR_ to FCERR_. (Ola Söder, closes #5415)
diff --git a/src/version.c b/src/version.c
index b86424f..432ae4d 100644
--- a/src/version.c
+++ b/src/version.c
@@ -743,6 +743,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    67,
+/**/
     66,
 /**/
     65,